+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2017 Red Hat, Inc.
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation. See file COPYING.
- *
- */
-
-#ifndef CEPH_ALLOC_PTR_H
-#define CEPH_ALLOC_PTR_H
-
-#include <memory>
-
-template <class T>
-class alloc_ptr
-{
-public:
- typedef typename std::pointer_traits< std::unique_ptr<T> >::pointer pointer;
- typedef typename std::pointer_traits< std::unique_ptr<T> >::element_type element_type;
-
- alloc_ptr() : ptr() {}
-
- template<class U>
- alloc_ptr(U&& u) : ptr(std::forward<U>(u)) {}
-
- alloc_ptr(alloc_ptr<pointer>&& rhs) : ptr(std::move(rhs.ptr)) {}
- alloc_ptr(const alloc_ptr<pointer>& rhs) = delete;
- alloc_ptr& operator=(const alloc_ptr<pointer>&& rhs) {
- ptr = rhs.ptr;
- }
- alloc_ptr& operator=(const alloc_ptr<pointer>& rhs) {
- ptr = rhs.ptr;
- }
-
- void swap (alloc_ptr<pointer>& rhs) {
- ptr.swap(rhs.ptr);
- }
- element_type* release() {
- return ptr.release();
- }
- void reset(element_type *p = nullptr) {
- ptr.reset(p);
- }
- element_type* get() const {
- if (!ptr)
- ptr.reset(new element_type);
- return ptr.get();
- }
- element_type& operator*() const {
- if (!ptr)
- ptr.reset(new element_type);
- return *ptr;
- }
- element_type* operator->() const {
- if (!ptr)
- ptr.reset(new element_type);
- return ptr.get();
- }
- operator bool() const {
- return !!ptr;
- }
-
- friend bool operator< (const alloc_ptr& lhs, const alloc_ptr& rhs) {
- return std::less<element_type>(*lhs, *rhs);
- }
- friend bool operator<=(const alloc_ptr& lhs, const alloc_ptr& rhs) {
- return std::less_equal<element_type>(*lhs, *rhs);
- }
- friend bool operator> (const alloc_ptr& lhs, const alloc_ptr& rhs) {
- return std::greater<element_type>(*lhs, *rhs);
- }
- friend bool operator>=(const alloc_ptr& lhs, const alloc_ptr& rhs) {
- return std::greater_equal<element_type>(*lhs, *rhs);
- }
- friend bool operator==(const alloc_ptr& lhs, const alloc_ptr& rhs) {
- return *lhs == *rhs;
- }
- friend bool operator!=(const alloc_ptr& lhs, const alloc_ptr& rhs) {
- return *lhs != *rhs;
- }
-private:
- mutable std::unique_ptr<element_type> ptr;
-};
-
-#endif